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Aquarium - Anti-White Spot & Fungus

Anti-white spot and fungus 2
Fluffy white growths, fine white spots
Anti-white spot ingredients
PFK award

Suitable for coldwater and tropical aquariums. A 7-day course of treatment to treat the parasite White Spot and fungal infections.

White spot is a protozoan parasite; the adults live on the fish and appear as tiny white spots. The adult has a complex life cycle which results in hundreds of free swimming juveniles looking for a host fish to infest. Anti-White Spot & Fungus is a 7-day course of treatment which will eradicate white spot, other larger parasites & fungal growths which appear as cotton-wool-like growths.

Winner of the Water Treatments category in the PFK Manufactures Poll 2019.

Find out about the active ingredient in our 'What is Malachite Green?' article.

View our medicinal treatment rules 


  • Q: Is Anti-White Spot & Fungus a single-dose treatment?  A: No, this product has been designed to be added in four doses every other day over the course of 7 days.
  • Q: How do I use the treatment?  A: This is a 7-day course of treatment. Firstly, work out the dosage you’ll need to treat your aquarium, either from the bottle label or use our Dosage Calculator. Add this dose to the aquarium (following the instructions on the bottle label); this is day 1. Leave the aquarium until day 3. On day 3, add another dose (following the instructions on the bottle label). Repeat this dosage on day 5 and on day 7. After dosing on day 7, leave the product in for 7 days before performing a partial water change.  For example: if you have an aquarium of 200 litres, you will add a 10ml dose as instructed. On day 3 after adding this dosage, add another 10ml dose as instructed, and again on day 5, and again on day 7.
  • Q: How often can I repeat the treatment?  A: After completing the 4th dose on the 7th day, leave the product in for 7 days before performing a partial water change. You can then repeat the treatment or use another medication as necessary.
  • Q: Will Anti-White Spot & Fungus affect my water quality test results?  A: No, so long as the colour has faded from the water. This should happen within a few days of the final dose of the product being added.
  • Q: I have shrimps and snails in my aquarium. Can I still treat with Anti-White Spot & Fungus?  A: Yes, the working concentration of the product is non-toxic to snails, shrimp and fish, etc.
  • Q: Is Aquarium Anti-White Spot & Fungus safe to use with clown loach at full dose? A: All of the medication in our Aquarium range are formulated with sensitive species in mind. There's no need to use half doses, but if you think you have a particularly sensitive fish, you can always give the treatment as two halves given throughout the day.

For common frequently asked questions, click here.




Active Ingredients: Malachite Green 140 mg/100 ml, Formaldehyde 800 mg/100 ml

Available in the following variations:


Where to Buy?

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Let us calculate your dosage for you!

To make the process of using our products even easier this handy dosage calculator tells you the amount you will need to put into your system.  Please ensure you also read the instructions and warnings that are written on the bottle/pack label.

Note: This calculator does not take into account water displacement such as that caused by substrate, ornaments, water features and plants etc. Therefore, please adjust the calculated volume accordingly.

I know my system's measurements and want to:

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Dosage calculator

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You’ll require*
0 ml

This indicates the TOTAL amount required to undertake a full course of treatment across 7 days - divide the total amount by the number of days you are required to treat for (4 days in total - treating on day 1, 3, 5, and 7 with equal amounts).

* Always follow the instructions on the label. This calculator is intended to be used only as a guide to how much product you need to buy to treat your system. It does not take account of displacement caused by gravel, rocks and ornaments etc and does not include the volume of any external filtration system. NT Laboratories Ltd. will not accept any responsibility for inaccuracies or misuse of this guide.